Riveting gun



April 3, 1962 M. su BEN 3,027,787

RIVETINGGUN Filed Nov. 7, 1960 INVENTOR. MoRTE/V 5uBN nited rates Patent Ghhce 3,%Z7,787 Patented Apr. 3, 1962 s,e27,7s7 RIVETING GUN Morten Snhen, 465 Lincoln Ave, Meant Vernon, NY. Filed Nov. 7, 1950, S83. No. 67,547 14 (Ilaims. or. id-46} This invention relates to what I term a riveting gun, generally of pistol-like contour, wherein the hand-grip portion of the gun comprises a pair of relatively movable grip elements telescoping one within the other. More particularly, the invention deals with a gun of the character described, wherein one of the elements includes means for supporting a center punch therein, which punch is advanced by said element in the direction of an anvil supported on the other element in performing a riveting operation on a workpiece disposed between the point of the punch and said anvil.

The novel features of the invention will be best understood from the following description, when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

FIG. 1 is a side view of a gun made according to my invention, with parts of the construction broken away and in section, the gun being shown in its normal inoperative position.

FIG. 1A is an enlarged detail view, diagrammatically illustrating a riveting operation.

FIG. 2 is an enlarged section on the line 2-2 of FIG. 1, with part of the construction shown in elevation and omitting the center punch of the gun.

FIG. 3 is an enlarged section on the line 3--3 of FIG. 1; and

FIG. 4 is an enlarged section on the line 44 of FIG. 1.

In illustrating one adaptation and use of my invention, I have shown at and 11 the two primary elements of the gun, these elements comprising handgrip portions 12 and 13, respectively, of any suitable contour, but both being channel-shaped in cross-sectional form, in other words, including side plates 14 and 15 joined by rounded portions 16 and 17. The plates 14 fit within the plates 15, as will clearly appear from a consideration of FIG. 1. The upper end of the plates 14 are joined by a halfround seat 18, note FIG. 2 of the drawing; whereas, the plates 15 are joined by a half-round portion 19, having a shoulder portion 20, along which the upper edge of the plates 14 ride in relative movement of the elements 10 and 11 one with respect to the other.

Considering FIGS. 1 and 4 of the drawing, it will appear that the rounded portion 19 of the element 11 has a projecting cylinder portion 21, this cylinder portion including an ofiset and outwardly extending arm 22, the arm terminating at its end in an angularly extending portion 23 having an inwardly projecting conical pin 24 which may be utilized as an anvil. However, when the element 11 is formed as a casting, it is preferred that a cup-shaped anvil 25 be mounted on the pin and this anvil includes, at its exposed end, a socket 26 to receive the head 27 of a screw or rivet 28, as diagrammatically illustrated in FIG. 1A of the drawing. In this figure, 29 is shown as a screw for securing a hinge plate 3d to the frame or earbow 31 of a pair of eyeglasses and, from this standpoint, 31 has been indicated by sectioning to be formed by a plastic material.

It is a well known fact that screws and rivets for supporting the hinge structure of eyeglasses often become loose and require resetting and my gun has a particular use in solving the problem of reheading a rivet or in heading the screw, as diagrammatically illustrated at 32 in FIG. 1A, as later described.

The half-round portion 13 of the element 10 projects beyond the plates 14, as seen at 33 in FIG. 1 of the drawing, and the terminal end of this projecting portion is coned or bevelled inwardly, as seen at 34, to engage a tapered portion 35 on a standard type of center punch 36 which, for the most part, is diagrammatically illustrated. The hammer rod of the punch 36 is seen at 37 in FIG. 1 of the drawing and detachably coupled with this rod is a point 38, detachable mounting being provided for replacement of the point or to modify the type of point used in the punch.

The end 39 of the punch 36 is arranged within an upwardly extending end wall 40 on the element 10, 4t} being a flattened extension of the rounded portion 16. To facilitate assemblage of the punch 36 with the element 10, the elements 10 and 11 are readily separable by removing the milled nut 41 of a bolt 42 and removing this bolt from elongated apertures 43 in the side walls 14 of the element ill and the aperture in the walls 15 receiving the bolt. It will be understood that the elongated apertures 4-3 provide movement of the elements 10- and 11 one with respect to the other and the length of the apertures 43 will limit movement of the elements one with respect to the other in both directions. However, this movement is suflicient to allow the trigger setting mechanism of the center punch to be actuated in the automatic striking of the hammer blow on the rod 37 in performing the riveting operation, as at 32 in FIG. 1A of the drawing. The spacing between 38 and 25 with the gun in inoperative position is sulricient to more than clear the workpiece operated upon and, in the present illustration of one use of my invention, is sutficient to receive the frame and earpiece and the hinge structure joining the earpiece, as noted in FIG. 1A of the drawing. Initially, the elements it) and Ill, or the handgrip portions 12 and 13 thereof, are moved slowly toward each other to bring the head 27 of the screw 29 in the recess 26 and the point 33 upon the end of the screw; whereupon, further drawing of the elements 10 and 11 together will result in actuation of the automatic center punch applying the hammer blow to the rod 37 and, thus, producing the head, as at 32 in FIG. 1A.

The upper end of the rounded portions 16 and 17 of the elements It and 11 have suitable means, such as inwardly extending beads 44 and 45, respectively, forming stops checking inward movement of ends 46 of a curved leaf-spring 47. The spring 47 is arranged within the channels of the elements 10 and I1 and normally support these elements in their extended position, as shown in FIG. 1 of the drawing. In other words, upon release of the handgripping pressure upon the elements In and 11, the spring 47 serves to return the elements to their normal position.

It will be understood that the bevelled or inturned portion 34 serves to retain the punch 36 in definitely keyed position in the channel 18, so that 36 will, at all times, move with the element It). It Will be noted, from a consideration of FIGS. 1 and 3 of the drawing, that the angular end 23 of the arm 22 includes a reinforcing rib 23 to aid in resisting the hammer blow in the riveting operation.

My improved gun can be sold in conjunction with standard types of automatic center punches, such as 36, or can be sold apart from the center punch, particularly when the center punch is in the possession of the purchaser.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A riveting gun of the character described, comprising two relatively movable elements, each element having a handgrip portion, means coupling said elements for limited movement in both directions one with respect to the other, one element having means for supporting a center punch thereon, the other element having cylindrical means guiding part of the first named element and the center punch in relative movement of said elements one with respect to the other, the center punch having a riveting point normally projecting beyond the end of the cylindrical means, means on the second named element supporting an anvil in axial alinement with and spaced with respect to said riveting point, and tensional means for normally supporting said elements in spaced relationship to each other.

2. A gun as defined in claim 1, wherein handgrip portions of each of said elements are or" channel cross-see tional form.

3. A gun as defined in claim 1, wherein the second named means includes means at ends of the first named element for definitely locating the center punch on the first named element and against movement relatively to said first named element.

4. A gun as defined in claim 1, wherein said anvil comprises a removable cup-shaped member.

5. A gun as defined in claim 1, wherein said anvil comprises a removable cup-shaped member, and said member having on the surface thereof alined with said riveting point an article engaging recess.

6. A gun as defined in claim 1, wherein said last named means comprises a leaf-spring, and said elements having means retaining the spring in predetermined position with respect to said elements.

7. A gun as defined in claim 1, wherein the anvil supporting means comprises an offset arm having an angular extension at its free end, and means for reinforcing said angular extension.

8. A gun as defined in claim 1, wherein the second named means comprises a half-round seat, and means for retaining the center punch against movement longitudinally of said seat.

9. In a riveting gun of the class descri'ced for supporting a center punch, said gun comprising two manually actuated elements movable toward and from each other, means checking movement of said elements in both direc- 5 tions, one element including means for supporting a center punch thereon against movement relatively thereto, the other element having cylindrical means for guiding said last named means in mov ment of the elements toward from each other, said second named element including supporting an anvil in spaced relation to the cylindrical p 'on of said second'narned element, and tensicnai means for moving said elements in one direction.

10. A gun as defined in ciaim 9, wherein the anvil supporting means comprises an arm offset with respect to and proiecting beyond the end of said cylindrical portion, and said arm having an end ofiset angulariy with respect thereto to position said end in alinement with the axis of said cylindrical portion.

ll. A gun as defined in claim 10, wherein means is empioyed to reinforce said end of the arm.

12. A gun as defined in claim 9, wherein said first named means comprises a bolt mounted in one element and operating in an elongated slot in the other element.

l3. In a riveting gun of the class described for supporting a center punch, said gun comprising two elements movable toward and from each other, one eiement having a cylindrical portion for guiding a center punch in operation of the gun, said element having anvil means spaced from. sa'd cylindrical portion, and the other element operativeiy engaging a center punch in movement thereof through the fust named element in the direction of said anvil.

14. A gun as defined in claim 13, wherein means is 35 employed for checking movement of said second named element.v

No references cited, 

